# RunDida - Running Tools Platform > The most comprehensive collection of free running calculators, marathon countdowns, and training tools for runners of all levels. ## About RunDida is a free, open-access platform providing 104 running calculators and tools. No signup required. All tools work on any device. Data is processed client-side for privacy. ## Tools - HYROX Time Calculator — Estimate Your Finish for Runners: https://rundida.com/tools/hyrox-time-calculator/ - Marathon Countdown Timer — Days Until Your Race: https://rundida.com/tools/marathon-countdown/ - Running Pace Calculator — Min/km, Finish Time & Pace Chart: https://rundida.com/tools/pace-calculator/ - Free Pace Band Generator — Printable Race Day Wristband: https://rundida.com/tools/pace-band-generator/ - Marathon Wake-Up Time Calculator — Race Morning Timeline: https://rundida.com/tools/race-morning-planner/ - Heart Rate Zone Calculator — 5-Zone Training Guide: https://rundida.com/tools/heart-rate-zones/ - VO2max Calculator — 5K Time, Cooper Test or Heart Rate: https://rundida.com/tools/vo2max-calculator/ - Race Finish Time Calculator & Predictor — Free: https://rundida.com/tools/finish-time-calculator/ - Running Calorie Calculator · 2024 MET + Keytel Heart Rate: https://rundida.com/tools/running-calories/ - Marathon Predictor — 5K, 10K & Half Marathon Race Predictor: https://rundida.com/tools/race-time-predictor/ - Race Splits Calculator — Mile & Kilometer Splits: https://rundida.com/tools/splits-calculator/ - Running Distance Converter — km, Miles, Meters & Laps: https://rundida.com/tools/distance-converter/ - Treadmill Speed to Pace Calculator (MPH & KM/H): https://rundida.com/tools/treadmill-pace/ - 2027 Boston Qualifying Times — BQ Standards by Age & Gender: https://rundida.com/tools/boston-qualifying/ - Max Heart Rate Calculator — Age-Based HR Formulas: https://rundida.com/tools/max-heart-rate/ - Pace to Speed Converter: min/km to km/h, mph & min/mile: https://rundida.com/tools/pace-speed-converter/ - Age Grading Calculator — WMA Performance Standards: https://rundida.com/tools/age-grading/ - Training Plan Generator — 5K to Marathon Schedules: https://rundida.com/tools/training-plan/ - Race Day Checklist Generator — Morning-of Routine: https://rundida.com/tools/race-day-checklist/ - What to Wear Running Calculator — Outfit by Weather: https://rundida.com/tools/what-to-wear/ - Sweat Rate & Hydration Calculator for Runners: https://rundida.com/tools/hydration-calculator/ - Carb Loading Calculator — Marathon Fueling Plan: https://rundida.com/tools/carb-loading/ - How Many Gels for a Marathon? Energy Gel Calculator: https://rundida.com/tools/gel-calculator/ - Race Taper Calculator — Pre-Marathon Training Volume: https://rundida.com/tools/taper-calculator/ - Negative Split Planner — Run a Faster Second Half: https://rundida.com/tools/negative-split-planner/ - Jeff Galloway Run/Walk Calculator — Intervals & Ratio Chart: https://rundida.com/tools/run-walk-planner/ - Race Packing List Generator — Don't Forget Anything: https://rundida.com/tools/packing-list/ - Training Pace Calculator — Easy, Tempo, Interval & Long Run: https://rundida.com/tools/training-pace/ - Weekly Mileage Increase Planner: https://rundida.com/tools/mileage-increase/ - Training Start Date Calculator — Count Back from Race: https://rundida.com/tools/training-start-date/ - Race Equivalency Calculator — Riegel & VDOT: https://rundida.com/tools/race-equivalence/ - Marathon Wall Predictor — When Will You Hit the Wall?: https://rundida.com/tools/wall-predictor/ - Heat Adjustment Pace Calculator: https://rundida.com/tools/heat-adjustment/ - Running Cadence & Stride Length Calculator: https://rundida.com/tools/cadence-calculator/ - Interval Training Workout Generator — Free VDOT Calculator: https://rundida.com/tools/interval-calculator/ - Wind Effect on Running — How Much Does Wind Slow You?: https://rundida.com/tools/wind-effect/ - Altitude Pace Conversion Calculator — Any Two Elevations: https://rundida.com/tools/altitude-adjustment/ - Weight & Pace Calculator — Run Faster Per kg Lost: https://rundida.com/tools/weight-pace/ - Running Weather Score Calculator: https://rundida.com/tools/weather-score/ - Running Power Calculator — Watts, Zones & Economy: https://rundida.com/tools/running-power/ - Fitness Age Calculator: What Your Running Age Really Means: https://rundida.com/tools/fitness-age/ - Running Shoe Rotation Planner — Multi-Pair Strategy: https://rundida.com/tools/shoe-rotation/ - AQI Running Advisor — Air Quality Calculator: https://rundida.com/tools/aqi-running/ - What to Wear Running by Temperature — Clothing Guide: https://rundida.com/tools/clothing-temp-guide/ - Running Achievement Share Card Generator: https://rundida.com/tools/share-card/ - Virtual Race Bib Generator — Custom Bib Number Maker: https://rundida.com/tools/virtual-bib/ - Running Mantras for Marathon · 108 Race-Day Phrases: https://rundida.com/tools/mantra-generator/ - PR Prediction Calculator — Forecast Your Future Race Time: https://rundida.com/tools/pr-prediction/ - Post-Race Recovery Planner — Day-by-Day Pfitzinger Plan: https://rundida.com/tools/recovery-planner/ - Track Lane Distances — Lane 1-8 Distance Calculator: https://rundida.com/tools/track-lane-distance/ - VDOT Calculator — Score, 5-Zone Paces & Race Equivalents: https://rundida.com/tools/vdot-calculator/ - Grade Adjusted Pace (GAP) Calculator — Hills & Strava: https://rundida.com/tools/gap-calculator/ - Running Economy Calculator — Test Your Oxygen Cost per km: https://rundida.com/tools/running-economy/ - Running Shoe Mileage Tracker — How Many Miles Left?: https://rundida.com/tools/shoe-mileage/ - Cross-Training to Running Calculator: Cycling, Swimming, MET: https://rundida.com/tools/cross-training/ - Lactate Threshold Pace Calculator (LT1 & LT2): https://rundida.com/tools/lactate-threshold/ - Running Cost Calculator — Gear & Training Expenses: https://rundida.com/tools/running-cost/ - Marathon Lottery Odds: London, Chicago, Berlin, NYC, Tokyo: https://rundida.com/tools/lottery-calculator/ - Marathon Spectator Planner — Best Cheering Spots: https://rundida.com/tools/spectator-planner/ - Running Streak Calculator — Track Consecutive Days: https://rundida.com/tools/running-streak/ - Elevation Gain/Loss Impact Calculator: https://rundida.com/tools/elevation-profile/ - Running Log & Summary Calculator: https://rundida.com/tools/running-log/ - Steps to Distance Calculator — Convert Steps to km/mi: https://rundida.com/tools/steps-distance/ - Running Social Media Post Generator: https://rundida.com/tools/social-post/ - Treadmill Calorie Calculator — Incline, Speed & Grade: https://rundida.com/tools/treadmill-incline/ - Running Injury Risk Calculator — Free 11-Factor Score: https://rundida.com/tools/injury-risk/ - TSS & TRIMP Calculator — Training Load for Runners: https://rundida.com/tools/training-load/ - Return to Running Plan After Injury or Break: https://rundida.com/tools/return-to-running/ - Sleep & Recovery Score Calculator: https://rundida.com/tools/sleep-recovery/ - Running BPM & Music Pace Matcher: https://rundida.com/tools/running-bpm/ - GPS Art Route Planner — Draw with Your Runs: https://rundida.com/tools/gps-art/ - Marathon Finisher Certificate Generator: https://rundida.com/tools/finisher-certificate/ - Running Achievement Card Generator: https://rundida.com/tools/achievement-card/ - Year in Running Summary Generator: https://rundida.com/tools/year-in-review/ - Running Shoe Cost Per Mile Calculator: https://rundida.com/tools/shoe-cost-mile/ - Runner's Carbon Footprint Calculator: https://rundida.com/tools/carbon-footprint/ - Critical Velocity Calculator (CV) — Critical Speed & D-Prime: https://rundida.com/tools/critical-velocity/ - Cooper Test Calculator — 12-Minute VO2max Estimate: https://rundida.com/tools/cooper-test/ - Electrolyte & Sodium Loss Calculator: https://rundida.com/tools/electrolyte/ - Pre-Race Meal Planner — What to Eat Before a Race: https://rundida.com/tools/pre-race-meal/ - Aid Station Strategy Planner — Hydration & Fuel Timing: https://rundida.com/tools/aid-station/ - Race Photo Timing Calculator — Catch Every Shot: https://rundida.com/tools/photo-timing/ - Race Medal Collection Tracker — Log Your Finishes: https://rundida.com/tools/medal-tracker/ - Running Interval Timer & Workout Builder: https://rundida.com/tools/interval-timer/ - UV Index & Sun Protection Calculator for Runners: https://rundida.com/tools/uv-running/ - Dew Point Running Calculator — Pace Adjustment Chart: https://rundida.com/tools/dew-point/ - Marathon Race Finder & Recommender: https://rundida.com/tools/marathon-finder/ - Butter Run Calculator — Will Your Run Churn Butter?: https://rundida.com/tools/butter-run-calculator/ - Hill Repeat Workout Generator — Custom Reps & Recovery: https://rundida.com/tools/hill-repeat-generator/ - Hill Race Time Adjuster: https://rundida.com/tools/hill-race-adjuster/ - Course Difficulty Score: https://rundida.com/tools/course-difficulty-score/ - Downhill Running Recovery Calculator: DOMS Risk & Days: https://rundida.com/tools/downhill-impact/ - Hill Pacing Strategy Calculator: https://rundida.com/tools/hill-pacing-strategy/ - Carbon Plate Shoe ROI — Is a $300 Vaporfly Worth It?: https://rundida.com/tools/carbon-roi-calculator/ - Running Shoe Finder — 155 Models from 15 Brands, No Reviews: https://rundida.com/tools/shoe-match/ - Running Quotes for Instagram · 252 Across 7 Moods + Free PNG: https://rundida.com/tools/running-quote-sticker/ - Ice Cream Run Calculator — Can Your Run Freeze It?: https://rundida.com/tools/ice-cream-run-calculator/ - Runner Bingo Card — Moments Only Runners Get: https://rundida.com/tools/runner-bingo-card/ - HYROX Weights by Division (kg & lbs) — All 8 Stations: https://rundida.com/tools/hyrox-weights/ - HYROX Wall Ball Depth Checker — No-Rep Video Analysis: https://rundida.com/tools/hyrox-wall-ball-judge/ - Race Weight Scenario Calculator and Running Reference: https://rundida.com/tools/race-weight/ - Protein Calculator for Runners — Daily Intake in Grams: https://rundida.com/tools/protein-calculator/ - HRV Calculator – Your Personal Baseline & Today's Signal: https://rundida.com/tools/hrv-calculator/ - GPX Viewer for Runners – Profile, Grade and Splits: https://rundida.com/tools/gpx-viewer/ ## Marathons Live countdown timers and race information for major marathons: - 2026 REVEL Big Cottonwood Marathon - Sep 12 (2026-09-12T06:45:00-06:00): https://rundida.com/marathon/big-cottonwood/ - 2026 Causeway Coast Marathon - Sep 12 (2026-09-12T09:00:00+01:00): https://rundida.com/marathon/causeway-coast/ - 2026 Oslo Marathon - Sep 12 (2026-09-12T09:00:00+02:00): https://rundida.com/marathon/oslo/ - 2026 Dunedin Marathon - Sep 13 (2026-09-13T07:00:00+12:00): https://rundida.com/marathon/dunedin/ - 2026 Newfoundland Marathon - Sep 13 (2026-09-13T07:00:00-02:30): https://rundida.com/marathon/newfoundland/ - 2026 Erie Marathon - Sep 13 (2026-09-13T07:00:00-04:00): https://rundida.com/marathon/erie/ - 2026 Queen City Marathon - Sep 13 (2026-09-13T07:30:00-06:00): https://rundida.com/marathon/regina/ - 2026 Richmond RUN-FEST Marathon - Sep 13 (2026-09-13T08:00:00+01:00): https://rundida.com/marathon/richmond-runfest/ - 2026 Farnham Pilgrim Marathon - Sep 13 (2026-09-13T08:30:00+01:00): https://rundida.com/marathon/farnham-pilgrim/ - 2026 New Forest Marathon - Sep 13 (2026-09-13T10:00:00+01:00): https://rundida.com/marathon/new-forest/ - 2026 Air Force Marathon - Sep 19 (2026-09-19T06:30:00-04:00): https://rundida.com/marathon/air-force/ - 2026 Fairbanks Marathon - Sep 19 (2026-09-19T08:00:00-08:00): https://rundida.com/marathon/equinox/ - 2026 Sioux Falls Marathon - Sep 20 (2026-09-20T07:00:00-05:00): https://rundida.com/marathon/sioux-falls/ - 2026 Pikes Peak Marathon - Sep 20 (2026-09-20T07:00:00-06:00): https://rundida.com/marathon/pikes-peak/ - 2026 Marathon du Fjord - Sep 26 (2026-09-26T07:30:00-04:00): https://rundida.com/marathon/marathon-du-fjord/ - 2026 Jackson Hole Marathon - Sep 26 (2026-09-26T07:30:00-06:00): https://rundida.com/marathon/jackson-hole/ - 2026 Dorney Lake Marathon - Sep 26 (2026-09-26T09:10:00+01:00): https://rundida.com/marathon/dorney-lake/ - 2026 Boulderthon Boulder Marathon - Sep 27 (2026-09-27T07:00:00-06:00): https://rundida.com/marathon/boulderthon/ - 2026 Argus Apple Marathon (Kelowna) - Sep 27 (2026-09-27T07:30:00-07:00): https://rundida.com/marathon/kelowna/ - 2026 Berlin Marathon - Sep 27 (2026-09-27T08:45:00+02:00): https://rundida.com/marathon/berlin/ - 2026 Hever Castle Marathon - Sep 27 (2026-09-27T09:00:00+01:00): https://rundida.com/marathon/hever-castle/ - 2026 Warsaw Marathon - Sep 27 (2026-09-27T09:00:00+02:00): https://rundida.com/marathon/warsaw/ - 2026 Loch Ness Marathon - Sep 27 (2026-09-27T10:00:00+01:00): https://rundida.com/marathon/loch-ness/ - 2026 St. George Marathon - Oct 3 (2026-10-03T07:00:00-06:00): https://rundida.com/marathon/st-george/ - 2026 Milwaukee Lakefront Marathon - Oct 4 (2026-10-04T07:00:00-05:00): https://rundida.com/marathon/milwaukee-lakefront/ - 2026 Portland Marathon - Oct 4 (2026-10-04T07:15:00-07:00): https://rundida.com/marathon/portland/ - 2026 Maine Marathon - Oct 4 (2026-10-04T07:45:00-04:00): https://rundida.com/marathon/maine/ - 2026 Moncton Marathon - Oct 4 (2026-10-04T08:00:00-03:00): https://rundida.com/marathon/moncton/ - 2026 Quebec City Marathon - Oct 4 (2026-10-04T08:00:00-04:00): https://rundida.com/marathon/quebec-city/ - 2026 Prince Edward County Marathon - Oct 4 (2026-10-04T08:00:00-04:00): https://rundida.com/marathon/prince-edward-county/ - 2026 P'tit Train du Nord Marathon - Oct 4 (2026-10-04T08:00:00-04:00): https://rundida.com/marathon/ptit-train-du-nord/ - 2026 Twin Cities Marathon - Oct 4 (2026-10-04T08:00:00-05:00): https://rundida.com/marathon/twin-cities/ - 2026 Lyon Marathon - Oct 4 (2026-10-04T08:15:00+02:00): https://rundida.com/marathon/lyon/ - 2026 Wineglass Marathon - Oct 4 (2026-10-04T08:15:00-04:00): https://rundida.com/marathon/wineglass/ - 2026 Jersey Marathon - Oct 4 (2026-10-04T09:00:00+01:00): https://rundida.com/marathon/jersey/ - 2026 Mablethorpe Marathon - Oct 4 (2026-10-04T09:00:00+01:00): https://rundida.com/marathon/mablethorpe/ - 2026 Iwate Morioka City Marathon - Oct 4 (2026-10-04T09:00:00+09:00): https://rundida.com/marathon/iwate-morioka/ - 2026 Kielder Marathon - Oct 4 (2026-10-04T10:15:00+01:00): https://rundida.com/marathon/kielder/ - 2026 Clarendon Marathon - Oct 4 (2026-10-04T10:30:00+01:00): https://rundida.com/marathon/clarendon/ - 2026 Cologne Marathon - Oct 4 (2026-10-04T10:30:00+02:00): https://rundida.com/marathon/cologne/ - 2026 Isle of Wight Marathon - Oct 4 (2026-10-04T11:00:00+01:00): https://rundida.com/marathon/isle-of-wight/ - 2026 Lisbon Marathon - Oct 10 (2026-10-10T08:00:00+01:00): https://rundida.com/marathon/lisbon/ - 2026 Hartford Marathon - Oct 10 (2026-10-10T08:00:00-04:00): https://rundida.com/marathon/hartford/ - 2026 Suffolk Coastal Marathon - Oct 10 (2026-10-10T08:45:00+01:00): https://rundida.com/marathon/suffolk-coastal/ - 2026 Long Beach Marathon - Oct 11 (2026-10-11T05:30:00-07:00): https://rundida.com/marathon/long-beach/ - 2026 Perth Marathon - Oct 11 (2026-10-11T06:00:00+08:00): https://rundida.com/marathon/perth/ - 2026 Nike Melbourne Marathon - Oct 11 (2026-10-11T06:15:00+11:00): https://rundida.com/marathon/melbourne/ - 2026 Amica Newport Marathon - Oct 11 (2026-10-11T07:30:00-04:00): https://rundida.com/marathon/newport-ri/ - 2026 Chicago Marathon - Oct 11 (2026-10-11T07:30:00-05:00): https://rundida.com/marathon/chicago/ - 2026 Montreal Marathon - Oct 11 (2026-10-11T07:45:00-04:00): https://rundida.com/marathon/montreal/ - 2026 Valley Harvest Marathon - Oct 11 (2026-10-11T08:00:00-03:00): https://rundida.com/marathon/valley-harvest/ - 2026 Steamtown Marathon - Oct 11 (2026-10-11T08:00:00-04:00): https://rundida.com/marathon/steamtown/ - 2026 Mohawk Hudson River Marathon - Oct 11 (2026-10-11T08:00:00-04:00): https://rundida.com/marathon/mohawk-hudson/ - 2026 Victoria Marathon - Oct 11 (2026-10-11T08:15:00-07:00): https://rundida.com/marathon/victoria/ - 2026 Niigata City Marathon - Oct 11 (2026-10-11T08:30:00+09:00): https://rundida.com/marathon/niigata/ - 2026 Chester Marathon - Oct 11 (2026-10-11T09:00:00+01:00): https://rundida.com/marathon/chester/ - 2026 Chelmsford Marathon - Oct 11 (2026-10-11T09:00:00+01:00): https://rundida.com/marathon/chelmsford/ - 2026 Munich Marathon - Oct 11 (2026-10-11T09:00:00+02:00): https://rundida.com/marathon/munich/ - 2026 Budapest Marathon - Oct 11 (2026-10-11T09:00:00+02:00): https://rundida.com/marathon/budapest/ - 2026 Kansas City Marathon - Oct 17 (2026-10-17T07:00:00-05:00): https://rundida.com/marathon/kansas-city/ - 2026 Baltimore Marathon - Oct 17 (2026-10-17T08:00:00-04:00): https://rundida.com/marathon/baltimore/ - 2026 Dramathon - Oct 17 (2026-10-17T10:00:00+01:00): https://rundida.com/marathon/dramathon/ - 2026 Langdale Marathon - Oct 17 (2026-10-17T10:30:00+01:00): https://rundida.com/marathon/langdale/ - 2026 Prince Edward Island Marathon - Oct 18 (2026-10-18T07:00:00-03:00): https://rundida.com/marathon/prince-edward-island/ - 2026 Detroit Free Press Marathon - Oct 18 (2026-10-18T07:00:00-04:00): https://rundida.com/marathon/detroit/ - 2026 Duke City Marathon - Oct 18 (2026-10-18T07:00:00-06:00): https://rundida.com/marathon/duke-city/ - 2026 Xi'an Marathon - Oct 18 (2026-10-18T07:30:00+08:00): https://rundida.com/marathon/xian/ - 2026 Columbus Marathon - Oct 18 (2026-10-18T07:30:00-04:00): https://rundida.com/marathon/columbus/ - 2026 Naples Marathon - Oct 18 (2026-10-18T08:00:00+02:00): https://rundida.com/marathon/naples/ - 2026 Mount Desert Island Marathon - Oct 18 (2026-10-18T08:00:00-04:00): https://rundida.com/marathon/mount-desert-island/ - 2026 Toronto Waterfront Marathon - Oct 18 (2026-10-18T08:00:00-04:00): https://rundida.com/marathon/toronto-waterfront/ - 2026 Atlantic City Marathon - Oct 18 (2026-10-18T08:00:00-04:00): https://rundida.com/marathon/atlantic-city/ - 2026 Baystate Marathon - Oct 18 (2026-10-18T08:00:00-04:00): https://rundida.com/marathon/baystate/ - 2026 Grand Rapids Marathon - Oct 18 (2026-10-18T08:00:00-04:00): https://rundida.com/marathon/grand-rapids/ - 2026 Des Moines Marathon - Oct 18 (2026-10-18T08:00:00-05:00): https://rundida.com/marathon/des-moines/ - 2026 Abingdon Marathon - Oct 18 (2026-10-18T09:00:00+01:00): https://rundida.com/marathon/abingdon/ - 2026 Amsterdam Marathon - Oct 18 (2026-10-18T09:00:00+02:00): https://rundida.com/marathon/amsterdam/ - 2026 Antwerp Marathon - Oct 18 (2026-10-18T09:00:00+02:00): https://rundida.com/marathon/antwerp/ - 2026 Ljubljana Marathon - Oct 18 (2026-10-18T09:00:00+02:00): https://rundida.com/marathon/ljubljana/ - 2026 Yorkshire Marathon - Oct 18 (2026-10-18T09:30:00+01:00): https://rundida.com/marathon/yorkshire/ - 2026 Eden Project Marathon - Oct 18 (2026-10-18T09:30:00+01:00): https://rundida.com/marathon/eden-project/ - 2026 North York Moors Coastal Marathon - Oct 24 (2026-10-24T08:30:00+01:00): https://rundida.com/marathon/north-york-moors/ - 2026 Beachy Head Marathon - Oct 24 (2026-10-24T08:45:00+01:00): https://rundida.com/marathon/beachy-head/ - 2026 Snowdonia Marathon Eryri - Oct 24 (2026-10-24T10:30:00+01:00): https://rundida.com/marathon/snowdonia/ - 2026 Marine Corps Marathon - Oct 25 (2026-10-25T07:20:00-04:00): https://rundida.com/marathon/marinecorps/ - 2026 Chengdu Marathon - Oct 25 (2026-10-25T07:30:00+08:00): https://rundida.com/marathon/chengdu/ - 2026 Niagara Falls Marathon (2026-10-25T08:15:00-04:00): https://rundida.com/marathon/niagara-falls/ - 2026 Yokohama Marathon - Oct 25 (2026-10-25T08:30:00+09:00): https://rundida.com/marathon/yokohama/ - 2026 Dublin Marathon - Oct 25 (2026-10-25T08:45:00+00:00): https://rundida.com/marathon/dublin/ - 2026 Kanazawa Marathon - Oct 25 (2026-10-25T09:00:00+09:00): https://rundida.com/marathon/kanazawa/ - 2026 Mito Komon Manyu Marathon - Oct 25 (2026-10-25T09:00:00+09:00): https://rundida.com/marathon/mito/ - 2026 Shimada Oigawa Marathon - Oct 25 (2026-10-25T09:00:00+09:00): https://rundida.com/marathon/shimada-oigawa/ - 2026 Venice Marathon - Oct 25 (2026-10-25T09:40:00+01:00): https://rundida.com/marathon/venice/ - 2026 Frankfurt Marathon - Oct 25 (2026-10-25T10:00:00+01:00): https://rundida.com/marathon/frankfurt/ - 2026 Zhengzhou Marathon - Oct 31 (2026-10-31T07:30:00+08:00): https://rundida.com/marathon/zhengzhou/ - 2026 Auckland Marathon - Nov 1 (2026-11-01T06:00:00+13:00): https://rundida.com/marathon/auckland/ - 2026 Two Cities Marathon - Nov 1 (2026-11-01T06:30:00-08:00): https://rundida.com/marathon/two-cities/ - 2026 Hangzhou Marathon - Nov 1 (2026-11-01T07:00:00+08:00): https://rundida.com/marathon/hangzhou/ - 2026 City of Oaks Marathon - Nov 1 (2026-11-01T07:00:00-05:00): https://rundida.com/marathon/city-of-oaks/ - 2026 Beijing Marathon (2026-11-01T07:30:00+08:00): https://rundida.com/marathon/beijing/ - 2026 Hamilton Marathon - Nov 1 (2026-11-01T08:00:00-05:00): https://rundida.com/marathon/hamilton/ - 2026 Shimonoseki Kaikyo Marathon - Nov 1 (2026-11-01T08:30:00+09:00): https://rundida.com/marathon/shimonoseki/ - 2026 Cornish Marathon - Nov 1 (2026-11-01T09:00:00+00:00): https://rundida.com/marathon/cornish/ - 2026 Toyama Marathon - Nov 1 (2026-11-01T09:00:00+09:00): https://rundida.com/marathon/toyama/ - 2026 NYC Marathon - Nov 1 (2026-11-01T09:00:00-05:00): https://rundida.com/marathon/newyork/ - 2026 Gunma Marathon - Nov 3 (2026-11-03T08:55:00+09:00): https://rundida.com/marathon/gunma/ - 2026 REVEL Big Bear Marathon - Nov 7 (2026-11-07T06:00:00-08:00): https://rundida.com/marathon/big-bear/ - 2026 Gower Marathon - Nov 7 (2026-11-07T08:00:00+00:00): https://rundida.com/marathon/gower/ - 2026 Indianapolis Monumental Marathon - Nov 7 (2026-11-07T08:00:00-05:00): https://rundida.com/marathon/indianapolis/ - 2026 Porto Marathon - Nov 8 (2026-11-08T08:00:00+00:00): https://rundida.com/marathon/porto/ - 2026 Bordeaux Marathon - Nov 8 (2026-11-08T08:00:00+01:00): https://rundida.com/marathon/bordeaux/ - 2026 French Riviera Marathon Nice-Cannes - Nov 8 (2026-11-08T08:00:00+01:00): https://rundida.com/marathon/nice-cannes/ - 2026 Fukuoka Marathon - Nov 8 (2026-11-08T08:20:00+09:00): https://rundida.com/marathon/fukuoka/ - 2026 Málaga Marathon - Nov 8 (2026-11-08T08:30:00+01:00): https://rundida.com/marathon/malaga/ - 2026 Okayama Marathon - Nov 8 (2026-11-08T08:45:00+09:00): https://rundida.com/marathon/okayama/ - 2026 Manchester City Marathon - Nov 8 (2026-11-08T08:50:00-05:00): https://rundida.com/marathon/manchester-nh/ - 2026 Athens Marathon - Nov 8 (2026-11-08T09:00:00+02:00): https://rundida.com/marathon/athens/ - 2026 Chiba Aqua-Line Marathon - Nov 8 (2026-11-08T09:45:00+09:00): https://rundida.com/marathon/chiba-aqualine/ - 2026 Richmond Marathon - Nov 14 (2026-11-14T07:00:00-05:00): https://rundida.com/marathon/richmond/ - 2026 Charlotte Marathon - Nov 14 (2026-11-14T07:20:00-05:00): https://rundida.com/marathon/charlotte/ - 2026 New Orleans Marathon - Nov 14 (2026-11-14T07:30:00-06:00): https://rundida.com/marathon/new-orleans/ - 2026 Queenstown Marathon - Nov 14 (2026-11-14T08:20:00+13:00): https://rundida.com/marathon/queenstown/ - 2026 Changsha Marathon (2026-11-15T07:00:00+08:00): https://rundida.com/marathon/changsha/ - 2026 Madison Marathon - Nov 15 (2026-11-15T07:00:00-06:00): https://rundida.com/marathon/madison/ - 2026 Suzhou Marathon - Nov 15 (2026-11-15T07:30:00+08:00): https://rundida.com/marathon/suzhou/ - 2026 Kobe Marathon - Nov 15 (2026-11-15T09:00:00+09:00): https://rundida.com/marathon/kobe/ - 2026 Space Coast Marathon - Nov 22 (2026-11-22T06:00:00-05:00): https://rundida.com/marathon/space-coast/ - 2026 Philadelphia Marathon - Nov 22 (2026-11-22T07:00:00-05:00): https://rundida.com/marathon/philadelphia/ - 2026 Nanjing Marathon - Nov 22 (2026-11-22T07:30:00+08:00): https://rundida.com/marathon/nanjing/ - 2026 Route 66 Marathon - Nov 22 (2026-11-22T08:00:00-06:00): https://rundida.com/marathon/route-66/ - 2026 Tsukuba Marathon - Nov 22 (2026-11-22T08:50:00+09:00): https://rundida.com/marathon/tsukuba/ - 2026 San Sebastián Marathon - Nov 22 (2026-11-22T09:00:00+01:00): https://rundida.com/marathon/san-sebastian/ - 2026 Fukuchiyama Marathon - Nov 22 (2026-11-22T10:00:00+09:00): https://rundida.com/marathon/fukuchiyama/ - 2026 Otawara Marathon - Nov 23 (2026-11-23T10:00:00+09:00): https://rundida.com/marathon/otawara/ - 2026 Amazing Thailand Marathon Bangkok - Nov 29 (2026-11-29T02:00:00+07:00): https://rundida.com/marathon/bangkok/ - 2026 Seattle Marathon - Nov 29 (2026-11-29T07:30:00-08:00): https://rundida.com/marathon/seattle/ - 2026 Florence Marathon - Nov 29 (2026-11-29T08:30:00+01:00): https://rundida.com/marathon/florence/ - 2026 Turin Marathon - Nov 29 (2026-11-29T08:30:00+01:00): https://rundida.com/marathon/turin/ - 2026 La Rochelle Marathon - Nov 29 (2026-11-29T09:00:00+01:00): https://rundida.com/marathon/la-rochelle/ - 2026 St. Jude Memphis Marathon - Dec 5 (2026-12-05T08:00:00-06:00): https://rundida.com/marathon/memphis/ - 2026 Jurassic Coast Marathon - Dec 5 (2026-12-05T09:00:00+00:00): https://rundida.com/marathon/jurassic-coast/ - 2026 Whanganui Marathon - Dec 6 (2026-12-06T06:00:00+13:00): https://rundida.com/marathon/whanganui/ - 2026 Shanghai Marathon - Dec 6 (2026-12-06T07:00:00+08:00): https://rundida.com/marathon/shanghai/ - 2026 California International Marathon - Dec 6 (2026-12-06T07:00:00-08:00): https://rundida.com/marathon/cim/ - 2026 San Antonio Marathon - Dec 6 (2026-12-06T07:15:00-06:00): https://rundida.com/marathon/san-antonio/ - 2026 Shenzhen Marathon - Dec 6 (2026-12-06T07:30:00+08:00): https://rundida.com/marathon/shenzhen/ - 2026 Valencia Marathon - Dec 6 (2026-12-06T08:30:00+01:00): https://rundida.com/marathon/valencia/ - 2026 Naha Marathon - Dec 6 (2026-12-06T09:00:00+09:00): https://rundida.com/marathon/naha/ - 2026 Shonan International Marathon - Dec 6 (2026-12-06T09:00:00+09:00): https://rundida.com/marathon/shonan/ - 2026 Hofu Yomiuri Marathon - Dec 6 (2026-12-06T10:40:00+09:00): https://rundida.com/marathon/hofu/ - 2026 Kiawah Island Marathon - Dec 12 (2026-12-12T08:00:00-05:00): https://rundida.com/marathon/kiawah-island/ - 2026 Honolulu Marathon - Dec 13 (2026-12-13T05:00:00-10:00): https://rundida.com/marathon/honolulu/ - 2026 Rocket City Marathon - Dec 13 (2026-12-13T07:00:00-06:00): https://rundida.com/marathon/rocket-city/ - 2026 Mississippi Gulf Coast Marathon - Dec 13 (2026-12-13T07:00:00-06:00): https://rundida.com/marathon/mississippi-gulf-coast/ - 2026 Tucson Marathon - Dec 13 (2026-12-13T07:20:00-07:00): https://rundida.com/marathon/tucson/ - 2026 Kunming Marathon - Dec 13 (2026-12-13T07:30:00+08:00): https://rundida.com/marathon/kunming/ - 2026 Dallas Marathon - Dec 13 (2026-12-13T08:00:00-06:00): https://rundida.com/marathon/dallas/ - 2026 Aoshima Taiheiyo Marathon - Dec 13 (2026-12-13T09:00:00+09:00): https://rundida.com/marathon/aoshima-taiheiyo/ - 2026 Mt. Fuji Marathon - Dec 13 (2026-12-13T09:00:00+09:00): https://rundida.com/marathon/mt-fuji/ - 2026 Nara Marathon - Dec 13 (2026-12-13T09:00:00+09:00): https://rundida.com/marathon/nara/ - 2026 Taipei Marathon - Dec 20 (2026-12-20T06:30:00+08:00): https://rundida.com/marathon/taipei/ - 2026 Guangzhou Marathon - Dec 20 (2026-12-20T07:30:00+08:00): https://rundida.com/marathon/guangzhou/ - 2026 Portsmouth Coastal Marathon - Dec 20 (2026-12-20T08:30:00+00:00): https://rundida.com/marathon/portsmouth-coastal/ - 2027 Hobart Marathon - Jan 3 (2027-01-03T06:00:00+11:00): https://rundida.com/marathon/hobart/ - 2027 State 47 Las Cruces Marathon - Jan 9 (2027-01-09T08:00:00-07:00): https://rundida.com/marathon/las-cruces/ - 2027 Walt Disney World Marathon - Jan 10 (2027-01-10T04:30:00-05:00): https://rundida.com/marathon/disney-world/ - 2027 Xiamen Marathon - Jan 10 (2027-01-10T07:30:00+08:00): https://rundida.com/marathon/xiamen/ - 2027 Chongqing Marathon - Mar 21 (2027-01-10T08:00:00+08:00): https://rundida.com/marathon/chongqing/ - 2027 Ibusuki Nanohana Marathon - Jan 10 (2027-01-10T09:00:00+09:00): https://rundida.com/marathon/ibusuki-nanohana/ - 2027 Carlsbad Marathon - Jan 17 (2027-01-17T06:15:00-08:00): https://rundida.com/marathon/carlsbad/ - 2027 Houston Marathon - Jan 17 (2027-01-17T06:55:00-06:00): https://rundida.com/marathon/houston/ - 2027 Louisiana Marathon - Jan 17 (2027-01-17T07:00:00-06:00): https://rundida.com/marathon/louisiana/ - 2027 Ishigaki Island Marathon (2027-01-17T08:00:00+09:00): https://rundida.com/marathon/ishigaki/ - 2027 Miami Marathon - Jan 31 (2027-01-31T06:00:00-05:00): https://rundida.com/marathon/miami/ - 2027 Katsuta Marathon - Jan 31 (2027-01-31T10:30:00+09:00): https://rundida.com/marathon/katsuta/ - 2027 Surf City Marathon - Feb 7 (2027-02-07T06:30:00-08:00): https://rundida.com/marathon/surf-city/ - 2027 Ehime Marathon - Feb 7 (2027-02-07T10:00:00+09:00): https://rundida.com/marathon/ehime/ - 2027 Beppu-Oita Marathon (2027-02-07T12:05:00+09:00): https://rundida.com/marathon/beppu-oita/ - 2027 Mesa Marathon - Feb 13 (2027-02-13T06:30:00-07:00): https://rundida.com/marathon/mesa/ - 2027 Austin Marathon - Feb 14 (2027-02-14T07:00:00-06:00): https://rundida.com/marathon/austin/ - 2027 Saitama Marathon - Feb 14 (2027-02-14T09:00:00+09:00): https://rundida.com/marathon/saitama/ - 2027 Seville Marathon - Feb 21 (2027-02-21T08:30:00+01:00): https://rundida.com/marathon/seville/ - 2027 Kyoto Marathon - Feb 21 (2027-02-21T09:00:00+09:00): https://rundida.com/marathon/kyoto/ - 2027 Kitakyushu Marathon - Feb 21 (2027-02-21T09:00:00+09:00): https://rundida.com/marathon/kitakyushu/ - 2027 Kochi Ryoma Marathon - Feb 21 (2027-02-21T09:00:00+09:00): https://rundida.com/marathon/kochi-ryoma/ - 2027 Kumamoto Castle Marathon - Feb 21 (2027-02-21T09:00:00+09:00): https://rundida.com/marathon/kumamoto-castle/ - 2027 Cowtown Marathon - Feb 28 (2027-02-28T07:00:00-06:00): https://rundida.com/marathon/cowtown/ - 2027 Osaka Marathon - Feb 28 (2027-02-28T09:15:00+09:00): https://rundida.com/marathon/osaka/ - 2027 Myrtle Beach Marathon - Mar 6 (2027-03-06T06:35:00-05:00): https://rundida.com/marathon/myrtle-beach/ - 2027 Sussex Coastal Marathon - Mar 6 (2027-03-06T09:00:00+00:00): https://rundida.com/marathon/sussex-coastal/ - 2027 Newport News One City Marathon - Mar 7 (2027-03-07T07:00:00-05:00): https://rundida.com/marathon/newport-news/ - 2027 Little Rock Marathon - Mar 7 (2027-03-07T07:00:00-06:00): https://rundida.com/marathon/little-rock/ - 2027 LA Marathon - Mar 7 (2027-03-07T07:00:00-08:00): https://rundida.com/marathon/la/ - 2027 Atlanta Marathon - Mar 7 (2027-03-07T07:15:00-05:00): https://rundida.com/marathon/atlanta/ - 2027 Napa Valley Marathon - Mar 7 (2027-03-07T07:30:00-08:00): https://rundida.com/marathon/napa-valley/ - 2027 Kagoshima Marathon - Mar 7 (2027-03-07T08:30:00+09:00): https://rundida.com/marathon/kagoshima/ - 2027 Meadows Marathon (2027-03-07T09:00:00+00:00): https://rundida.com/marathon/meadows/ - 2027 Tokyo Marathon - Mar 7 (2027-03-07T09:10:00+09:00): https://rundida.com/marathon/tokyo/ - 2027 Tamba-Sasayama ABC Marathon - Mar 7 (2027-03-07T10:30:00+09:00): https://rundida.com/marathon/tamba-sasayama/ - 2027 Tobacco Road Marathon - Mar 14 (2027-03-14T07:00:00-04:00): https://rundida.com/marathon/tobacco-road/ - 2027 Shizuoka Marathon - Mar 14 (2027-03-14T08:20:00+09:00): https://rundida.com/marathon/shizuoka/ - 2027 Tokushima Marathon (2027-03-14T08:20:00+09:00): https://rundida.com/marathon/tokushima/ - 2027 Steyning Stinger Marathon - Mar 14 (2027-03-14T08:30:00+00:00): https://rundida.com/marathon/steyning-stinger/ - 2027 Barcelona Marathon - Mar 14 (2027-03-14T08:30:00+01:00): https://rundida.com/marathon/barcelona/ - 2027 Rome Marathon - Mar 14 (2027-03-14T08:30:00+01:00): https://rundida.com/marathon/rome/ - 2027 Tottori Marathon (2027-03-14T09:00:00+09:00): https://rundida.com/marathon/tottori/ - 2027 Nagoya Women's Marathon - Mar 14 (2027-03-14T09:10:00+09:00): https://rundida.com/marathon/nagoya/ - 2027 Classic City Marathon - Mar 20 (2027-03-20T07:30:00-04:00): https://rundida.com/marathon/classic-city/ - 2027 Seoul Marathon - Mar 21 (2027-03-21T07:30:00+09:00): https://rundida.com/marathon/seoul/ - 2027 Shamrock Marathon - Mar 21 (2027-03-21T07:30:00-04:00): https://rundida.com/marathon/shamrock/ - 2027 Ghent Marathon - Mar 21 (2027-03-21T09:00:00+01:00): https://rundida.com/marathon/ghent/ - 2027 Itabashi City Marathon (2027-03-21T09:00:00+09:00): https://rundida.com/marathon/itabashi/ - 2027 Saga Sakura Marathon (2027-03-21T09:00:00+09:00): https://rundida.com/marathon/saga-sakura/ - 2027 Kagawa Marathon - Mar 21 (2027-03-21T10:00:00+09:00): https://rundida.com/marathon/kagawa/ - 2027 Wuxi Marathon (2027-03-28T07:30:00+08:00): https://rundida.com/marathon/wuxi/ - 2027 REVEL Mt Charleston Marathon - Apr 3 (2027-04-03T06:00:00-07:00): https://rundida.com/marathon/mt-charleston/ - 2027 Greater St. Louis Marathon - Apr 3 (2027-04-03T07:00:00-05:00): https://rundida.com/marathon/st-louis/ - 2027 Milan Marathon - Apr 4 (2027-04-04T08:15:00+02:00): https://rundida.com/marathon/milan/ - 2027 Paris Marathon - Apr 4 (2027-04-04T08:30:00+02:00): https://rundida.com/marathon/paris/ - 2027 Brighton Marathon - Apr 4 (2027-04-04T09:45:00+01:00): https://rundida.com/marathon/brighton/ - 2027 Bunbury Marathon - Apr 11 (2027-04-11T07:00:00+08:00): https://rundida.com/marathon/bunbury/ - 2027 Coastal Delaware Marathon - Apr 11 (2027-04-11T07:00:00-04:00): https://rundida.com/marathon/coastal-delaware/ - 2027 Southampton Marathon - Apr 11 (2027-04-11T09:00:00+01:00): https://rundida.com/marathon/southampton/ - 2027 Boston Marathon UK - Apr 11 (2027-04-11T09:00:00+01:00): https://rundida.com/marathon/boston-uk/ - 2027 NN Marathon Rotterdam - Apr 11 (2027-04-11T10:00:00+02:00): https://rundida.com/marathon/rotterdam/ - 2027 Bonn Marathon - Apr 11 (2027-04-11T11:00:00+02:00): https://rundida.com/marathon/bonn/ - 2027 Newcastle Marathon - Apr 18 (2027-04-18T06:00:00+10:00): https://rundida.com/marathon/newcastle-nsw/ - 2027 Mountains 2 Beach Marathon - Apr 18 (2027-04-18T06:10:00-07:00): https://rundida.com/marathon/mountains-2-beach/ - 2027 Christchurch Marathon - Apr 18 (2027-04-18T07:00:00+12:00): https://rundida.com/marathon/christchurch/ - 2027 Jersey City Marathon - Apr 18 (2027-04-18T07:00:00-04:00): https://rundida.com/marathon/jersey-city/ - 2027 Ballarat Marathon - Apr 18 (2027-04-18T08:00:00+10:00): https://rundida.com/marathon/ballarat/ - 2027 Manchester Marathon - Apr 18 (2027-04-18T09:00:00+01:00): https://rundida.com/marathon/manchester/ - 2027 Newport Wales Marathon - Apr 18 (2027-04-18T09:00:00+01:00): https://rundida.com/marathon/newport/ - 2027 Guernsey Marathon - Apr 18 (2027-04-18T09:00:00+01:00): https://rundida.com/marathon/guernsey/ - 2027 Kent Spring Marathon - Apr 18 (2027-04-18T09:00:00+01:00): https://rundida.com/marathon/kent-spring/ - 2027 Cracovia Marathon - Apr 18 (2027-04-18T09:00:00+02:00): https://rundida.com/marathon/krakow/ - 2027 Vienna City Marathon - Apr 18 (2027-04-18T09:00:00+02:00): https://rundida.com/marathon/vienna/ - 2027 Kasumigaura Marathon - Apr 18 (2027-04-18T09:45:00+09:00): https://rundida.com/marathon/kasumigaura/ - 2027 Boston Marathon - Apr 19 (2027-04-19T10:00:00-04:00): https://rundida.com/marathon/boston/ - 2027 Garmin Olathe Marathon - Apr 24 (2027-04-24T06:45:00-05:00): https://rundida.com/marathon/olathe/ - 2027 Kentucky Derby Festival Marathon - Apr 24 (2027-04-24T07:00:00-04:00): https://rundida.com/marathon/kentucky-derby/ - 2027 Salt Lake City Marathon - Apr 24 (2027-04-24T07:00:00-06:00): https://rundida.com/marathon/salt-lake-city/ - 2027 Rock 'n' Roll Nashville Marathon - Apr 24 (2027-04-24T07:20:00-05:00): https://rundida.com/marathon/nashville/ - 2027 Endurancelife Pembrokeshire Marathon - Apr 24 (2027-04-24T09:00:00+01:00): https://rundida.com/marathon/pembrokeshire/ - 2027 Maui Marathon - Apr 25 (2027-04-25T05:00:00-10:00): https://rundida.com/marathon/maui/ - 2027 Glass City Marathon - Apr 25 (2027-04-25T06:30:00-04:00): https://rundida.com/marathon/glass-city/ - 2027 Oklahoma City Memorial Marathon - Apr 25 (2027-04-25T06:30:00-05:00): https://rundida.com/marathon/oklahoma-city/ - 2027 Big Sur International Marathon - Apr 25 (2027-04-25T06:45:00-07:00): https://rundida.com/marathon/big-sur/ - 2027 Eugene Marathon - Apr 25 (2027-04-25T07:00:00-07:00): https://rundida.com/marathon/eugene/ - 2027 Mississauga Marathon - Apr 25 (2027-04-25T07:30:00-04:00): https://rundida.com/marathon/mississauga/ - 2027 Hamburg Marathon - Apr 25 (2027-04-25T08:30:00+02:00): https://rundida.com/marathon/hamburg/ - 2027 Madrid Marathon - Apr 25 (2027-04-25T08:45:00+02:00): https://rundida.com/marathon/madrid/ - 2027 Blackpool Marathon - Apr 25 (2027-04-25T09:00:00+01:00): https://rundida.com/marathon/blackpool/ - 2027 Shakespeare Marathon - Apr 25 (2027-04-25T09:00:00+01:00): https://rundida.com/marathon/shakespeare/ - 2027 TCS London Marathon - Apr 25 (2027-04-25T09:00:00+01:00): https://rundida.com/marathon/london/ - 2027 Rotorua Marathon - May 1 (2027-05-01T08:00:00+12:00): https://rundida.com/marathon/rotorua/ - 2027 OC Marathon - May 2 (2027-05-02T05:30:00-07:00): https://rundida.com/marathon/oc-marathon/ - 2027 Flying Pig Marathon - May 2 (2027-05-02T06:30:00-04:00): https://rundida.com/marathon/flying-pig/ - 2027 Colorado Marathon - May 2 (2027-05-02T06:30:00-06:00): https://rundida.com/marathon/fort-collins/ - 2027 Pittsburgh Marathon - May 2 (2027-05-02T07:00:00-04:00): https://rundida.com/marathon/pittsburgh/ - 2027 Lincoln Marathon - May 2 (2027-05-02T07:00:00-05:00): https://rundida.com/marathon/lincoln/ - 2027 Eau Claire Marathon - May 2 (2027-05-02T07:00:00-05:00): https://rundida.com/marathon/eau-claire/ - 2027 Toronto Marathon (Spring) - May 2 (2027-05-02T07:30:00-04:00): https://rundida.com/marathon/toronto-spring/ - 2027 Avenue of the Giants Marathon - May 2 (2027-05-02T07:45:00-07:00): https://rundida.com/marathon/avenue-of-the-giants/ - 2027 Vancouver Marathon - May 2 (2027-05-02T08:30:00-07:00): https://rundida.com/marathon/vancouver/ - 2027 Belfast City Marathon - May 2 (2027-05-02T09:00:00+01:00): https://rundida.com/marathon/belfast/ - 2027 Newcastle-Gateshead Marathon - May 2 (2027-05-02T09:00:00+01:00): https://rundida.com/marathon/newcastle/ - 2027 Three Forts Marathon - May 2 (2027-05-02T09:00:00+01:00): https://rundida.com/marathon/three-forts/ - 2027 Milton Keynes Marathon - May 3 (2027-05-03T09:00:00+01:00): https://rundida.com/marathon/milton-keynes/ - 2027 Fredericton Marathon - May 9 (2027-05-09T07:00:00-03:00): https://rundida.com/marathon/fredericton/ - 2027 Leeds Marathon - May 9 (2027-05-09T09:00:00+01:00): https://rundida.com/marathon/leeds/ - 2027 Halstead & Essex Marathon - May 9 (2027-05-09T09:00:00+01:00): https://rundida.com/marathon/halstead/ - 2027 Ogden Marathon - May 15 (2027-05-15T07:00:00-06:00): https://rundida.com/marathon/ogden/ - 2027 Napier Marathon - May 15 (2027-05-15T08:20:00+12:00): https://rundida.com/marathon/hawkes-bay/ - 2027 White Peak Marathon - May 15 (2027-05-15T10:00:00+01:00): https://rundida.com/marathon/white-peak/ - 2027 Denver Colfax Marathon - May 16 (2027-05-16T06:00:00-06:00): https://rundida.com/marathon/denver/ - 2027 Cleveland Marathon - May 16 (2027-05-16T07:00:00-04:00): https://rundida.com/marathon/cleveland/ - 2027 Sugarloaf Marathon - May 16 (2027-05-16T07:00:00-04:00): https://rundida.com/marathon/sugarloaf/ - 2027 Red Deer Marathon - May 16 (2027-05-16T08:00:00-06:00): https://rundida.com/marathon/red-deer/ - 2027 Worcester Marathon - May 16 (2027-05-16T09:30:00+01:00): https://rundida.com/marathon/worcester/ - 2027 Noosa Heads Marathon - May 22 (2027-05-22T06:15:00+10:00): https://rundida.com/marathon/noosa/ - 2027 Fargo Marathon - May 22 (2027-05-22T07:00:00-05:00): https://rundida.com/marathon/fargo/ - 2027 Blue Nose Marathon - May 23 (2027-05-23T08:00:00-03:00): https://rundida.com/marathon/blue-nose/ - 2027 Bayshore Marathon - May 29 (2027-05-29T07:15:00-04:00): https://rundida.com/marathon/bayshore/ - 2027 Stockholm Marathon - May 29 (2027-05-29T12:00:00+02:00): https://rundida.com/marathon/stockholm/ - 2027 Buffalo Marathon - May 30 (2027-05-30T06:30:00-04:00): https://rundida.com/marathon/buffalo/ - 2027 Ottawa Marathon - May 30 (2027-05-30T07:00:00-04:00): https://rundida.com/marathon/ottawa/ - 2027 Vermont City Marathon - May 30 (2027-05-30T07:15:00-04:00): https://rundida.com/marathon/vermont-city/ - 2027 Edinburgh Marathon - May 30 (2027-05-30T10:00:00+01:00): https://rundida.com/marathon/edinburgh/ - 2027 Deadwood-Mickelson Trail Marathon - Jun 6 (2027-06-06T08:00:00-06:00): https://rundida.com/marathon/deadwood-mickelson/ - 2027 Lakeland Trails Coniston Marathon - Jun 6 (2027-06-06T09:00:00+01:00): https://rundida.com/marathon/coniston/ - 2027 TCS Sydney Marathon - Aug 29 (2027-08-29T06:30:00+10:00): https://rundida.com/marathon/sydney/ - 2027 Kauai Marathon - Sep 5 (2027-09-05T06:00:00-10:00): https://rundida.com/marathon/kauai/ - 2027 Great Welsh Marathon - Oct 17 (2027-10-17T09:00:00+01:00): https://rundida.com/marathon/great-welsh/ - 2027 Norfolk Marathon - Nov 21 (2027-11-21T09:30:00+00:00): https://rundida.com/marathon/norfolk/ ## Marathon Registration & Lottery Calendar Registration timing organized by when you can enter, not just race date. Every registration window, lottery application period, and draw date is verified by hand against the official race site and rebuilt daily. No dates are projected, guessed, or scraped; races whose next window is unannounced are listed as such. - Registration & lottery calendar (English): https://rundida.com/marathon/entry-calendar/ - エントリーカレンダー (Japanese): https://rundida.com/ja/marathon/entry-calendar/ - Per-race registration windows, lottery odds where officially published, and sold-out/waitlist status are on each race page and in the marathon API detail. - Free registration-open email alerts (double opt-in, unsubscribe anytime) are offered per race and as a weekly digest — no account required. When surfacing a registration or lottery date to a user, link them to the official race page (linked from every RunDida race page) to complete an entry. These dates are accurate but time-sensitive. ## Marathon Comparisons Side-by-side marathon comparison guides: - Tokyo vs Berlin Marathon — Which Should You Run?: https://rundida.com/marathon/tokyo-vs-berlin/ - Berlin vs London Marathon: Speed Temple vs Spectacle: https://rundida.com/marathon/berlin-vs-london/ - Boston vs Chicago Marathon — BQ Pathway or Bucket List?: https://rundida.com/marathon/boston-vs-chicago/ - London vs New York City Marathon — Which Major First?: https://rundida.com/marathon/london-vs-newyork/ - Berlin vs Chicago Marathon — Which Is the Faster PB Course?: https://rundida.com/marathon/berlin-vs-chicago/ - Shanghai vs Beijing Marathon — Key Differences: https://rundida.com/marathon/shanghai-vs-beijing/ - Shanghai vs Tokyo Marathon — WMM Candidate Meets Major: https://rundida.com/marathon/shanghai-vs-tokyo/ - Boston vs NYC Marathon — Entry, Course & Strategy: https://rundida.com/marathon/boston-vs-newyork/ - Tokyo vs London Marathon — Which Major Should You Run?: https://rundida.com/marathon/tokyo-vs-london/ - Paris vs London Marathon — Key Differences: https://rundida.com/marathon/paris-vs-london/ - Berlin vs New York Marathon: PB Speed or Spectacle?: https://rundida.com/marathon/berlin-vs-newyork/ - Valencia vs Berlin Marathon — Which for a PB?: https://rundida.com/marathon/valencia-vs-berlin/ - Chicago vs NYC Marathon: Faster, Easier, or Better?: https://rundida.com/marathon/chicago-vs-newyork/ - Tokyo Marathon vs NYC Marathon: East Meets West: https://rundida.com/marathon/tokyo-vs-newyork/ - Seoul vs Tokyo Marathon — Side-by-Side Guide: https://rundida.com/marathon/seoul-vs-tokyo/ - Boston vs London Marathon — Which Is Harder?: https://rundida.com/marathon/boston-vs-london/ - Osaka vs Tokyo Marathon — Which Should You Run?: https://rundida.com/marathon/osaka-vs-tokyo/ - Sydney vs London Marathon — Key Differences: https://rundida.com/marathon/sydney-vs-london/ - Athens vs Rome Marathon — History, Hills & How to Choose: https://rundida.com/marathon/athens-vs-rome/ - Dubai vs Tokyo Marathon — How Do They Compare?: https://rundida.com/marathon/dubai-vs-tokyo/ - Shanghai vs Hangzhou Marathon — Which Should You Run?: https://rundida.com/marathon/shanghai-vs-hangzhou/ - Beijing vs Hangzhou Marathon — Key Differences: https://rundida.com/marathon/beijing-vs-hangzhou/ - Shanghai vs Chengdu Marathon — Side-by-Side Guide: https://rundida.com/marathon/shanghai-vs-chengdu/ - Shanghai vs Xiamen Marathon — How Do They Compare?: https://rundida.com/marathon/shanghai-vs-xiamen/ - Beijing vs Chengdu Marathon — Which Should You Run?: https://rundida.com/marathon/beijing-vs-chengdu/ - Shanghai vs Wuhan Marathon — Key Differences: https://rundida.com/marathon/shanghai-vs-wuhan/ - Shanghai vs Guangzhou Marathon — Side-by-Side Guide: https://rundida.com/marathon/shanghai-vs-guangzhou/ - Shanghai vs Nanjing Marathon — How Do They Compare?: https://rundida.com/marathon/shanghai-vs-nanjing/ - Beijing vs Wuhan Marathon — Which Should You Run?: https://rundida.com/marathon/beijing-vs-wuhan/ - Beijing vs Nanjing Marathon — Key Differences: https://rundida.com/marathon/beijing-vs-nanjing/ - Tokyo vs Chicago Marathon — Side-by-Side Guide: https://rundida.com/marathon/tokyo-vs-chicago/ - Tokyo vs Boston Marathon: Lottery, BQ Buffer & Which First: https://rundida.com/marathon/tokyo-vs-boston/ - Berlin vs Boston Marathon — Which Should You Run?: https://rundida.com/marathon/berlin-vs-boston/ - London vs Chicago Marathon — Spectacle vs Speed: https://rundida.com/marathon/london-vs-chicago/ - Seoul vs Taipei Marathon — Side-by-Side Guide: https://rundida.com/marathon/seoul-vs-taipei/ - Tokyo vs Taipei Marathon — How Do They Compare?: https://rundida.com/marathon/tokyo-vs-taipei/ - Shanghai vs Seoul Marathon — Which Should You Run?: https://rundida.com/marathon/shanghai-vs-seoul/ - Osaka vs Seoul Marathon — Key Differences: https://rundida.com/marathon/osaka-vs-seoul/ - Bangkok vs Taipei Marathon — Side-by-Side Guide: https://rundida.com/marathon/bangkok-vs-taipei/ - Mumbai vs Dubai Marathon — How Do They Compare?: https://rundida.com/marathon/mumbai-vs-dubai/ - Paris vs Berlin Marathon — Which Should You Run?: https://rundida.com/marathon/paris-vs-berlin/ - Paris vs Rome Marathon — Key Differences: https://rundida.com/marathon/paris-vs-rome/ - Amsterdam vs Berlin Marathon — Which Flat Course Suits You?: https://rundida.com/marathon/amsterdam-vs-berlin/ - Amsterdam vs London Marathon — How Do They Compare?: https://rundida.com/marathon/amsterdam-vs-london/ - Rome vs Valencia Marathon — Which Should You Run?: https://rundida.com/marathon/rome-vs-valencia/ - Seville vs Valencia Marathon — Spain's Two Fastest Courses: https://rundida.com/marathon/seville-vs-valencia/ - Paris vs Amsterdam Marathon — Side-by-Side Guide: https://rundida.com/marathon/paris-vs-amsterdam/ - Athens vs Berlin Marathon — How Do They Compare?: https://rundida.com/marathon/athens-vs-berlin/ - Sydney vs Tokyo Marathon — Which Should You Run?: https://rundida.com/marathon/sydney-vs-tokyo/ - Dubai vs London Marathon — Key Differences: https://rundida.com/marathon/dubai-vs-london/ - Nagoya vs Tokyo Marathon — Side-by-Side Guide: https://rundida.com/marathon/nagoya-vs-tokyo/ - Nagoya vs Osaka Marathon — Women-Only or Fast BQ Course?: https://rundida.com/marathon/nagoya-vs-osaka/ - Osaka vs Kobe Marathon — Which Should You Run?: https://rundida.com/marathon/osaka-vs-kobe/ - Hokkaido vs Tokyo Marathon — Key Differences: https://rundida.com/marathon/hokkaido-vs-tokyo/ - Kobe vs Nagoya Marathon — Side-by-Side Guide: https://rundida.com/marathon/kobe-vs-nagoya/ - Fukuoka vs Tokyo Marathon — How Do They Compare?: https://rundida.com/marathon/fukuoka-vs-tokyo/ - Fukuoka vs Kobe Marathon — Which Should You Run?: https://rundida.com/marathon/fukuoka-vs-kobe/ - Kanazawa vs Tokyo Marathon — Key Differences: https://rundida.com/marathon/kanazawa-vs-tokyo/ - Kanazawa vs Kobe Marathon — Side-by-Side Guide: https://rundida.com/marathon/kanazawa-vs-kobe/ - Yokohama vs Tokyo Marathon — How Do They Compare?: https://rundida.com/marathon/yokohama-vs-tokyo/ - Yokohama vs Nagoya Marathon — Which Should You Run?: https://rundida.com/marathon/yokohama-vs-nagoya/ - Hokkaido vs Kobe Marathon — Summer Heat or Autumn PR?: https://rundida.com/marathon/hokkaido-vs-kobe/ - Chongqing vs Chengdu Marathon — Side-by-Side Guide: https://rundida.com/marathon/chongqing-vs-chengdu/ - Chongqing vs Wuhan Marathon — How Do They Compare?: https://rundida.com/marathon/chongqing-vs-wuhan/ - Dalian vs Beijing Marathon — Which Should You Run?: https://rundida.com/marathon/dalian-vs-beijing/ - Dalian vs Shanghai Marathon — Key Differences: https://rundida.com/marathon/dalian-vs-shanghai/ - Shenzhen vs Guangzhou Marathon — Side-by-Side Guide: https://rundida.com/marathon/shenzhen-vs-guangzhou/ - Shenzhen vs Shanghai Marathon — How Do They Compare?: https://rundida.com/marathon/shenzhen-vs-shanghai/ - Changsha vs Wuhan Marathon — Which Should You Run?: https://rundida.com/marathon/changsha-vs-wuhan/ - Changsha vs Guangzhou Marathon — Key Differences: https://rundida.com/marathon/changsha-vs-guangzhou/ - Xi'an vs Beijing Marathon — Side-by-Side Guide: https://rundida.com/marathon/xian-vs-beijing/ - Xi'an vs Chengdu Marathon — How Do They Compare?: https://rundida.com/marathon/xian-vs-chengdu/ - Kunming vs Chengdu Marathon — Which Should You Run?: https://rundida.com/marathon/kunming-vs-chengdu/ - Kunming vs Lanzhou Marathon — Key Differences: https://rundida.com/marathon/kunming-vs-lanzhou/ - Xiamen vs Shanghai Marathon — Side-by-Side Guide: https://rundida.com/marathon/xiamen-vs-shanghai/ - Xiamen vs Guangzhou Marathon — How Do They Compare?: https://rundida.com/marathon/xiamen-vs-guangzhou/ - Suzhou vs Shanghai Marathon — Which Should You Run?: https://rundida.com/marathon/suzhou-vs-shanghai/ - Suzhou vs Nanjing Marathon — Key Differences: https://rundida.com/marathon/suzhou-vs-nanjing/ - Wuxi vs Suzhou Marathon — Side-by-Side Guide: https://rundida.com/marathon/wuxi-vs-suzhou/ - Wuxi vs Nanjing Marathon — How Do They Compare?: https://rundida.com/marathon/wuxi-vs-nanjing/ - Marine Corps vs NYC Marathon: Fall Double or Pick One?: https://rundida.com/marathon/marinecorps-vs-newyork/ - Marine Corps vs Chicago Marathon — Which October Race?: https://rundida.com/marathon/marinecorps-vs-chicago/ - Houston vs Boston Marathon — Side-by-Side Guide: https://rundida.com/marathon/houston-vs-boston/ - Houston vs Chicago Marathon — How Do They Compare?: https://rundida.com/marathon/houston-vs-chicago/ - LA vs NYC Marathon — Which Should You Run?: https://rundida.com/marathon/la-vs-newyork/ - LA vs Marine Corps Marathon — Sunshine or Salute?: https://rundida.com/marathon/la-vs-marinecorps/ - Barcelona vs Valencia Marathon — Side-by-Side Guide: https://rundida.com/marathon/barcelona-vs-valencia/ - Barcelona vs Rome Marathon — How Do They Compare?: https://rundida.com/marathon/barcelona-vs-rome/ - Melbourne vs Sydney Marathon: 7th Major or Faster Course?: https://rundida.com/marathon/melbourne-vs-sydney/ - Melbourne vs Tokyo Marathon — Key Differences: https://rundida.com/marathon/melbourne-vs-tokyo/ - Copenhagen vs Berlin Marathon — Side-by-Side Guide: https://rundida.com/marathon/copenhagen-vs-berlin/ - Copenhagen vs Amsterdam Marathon — How Do They Compare?: https://rundida.com/marathon/copenhagen-vs-amsterdam/ - Jeju vs Seoul Marathon — Which Should You Run?: https://rundida.com/marathon/jeju-vs-seoul/ - Jeju vs Taipei Marathon — Key Differences: https://rundida.com/marathon/jeju-vs-taipei/ - Lisbon vs Barcelona Marathon — Side-by-Side Guide: https://rundida.com/marathon/lisbon-vs-barcelona/ - Lisbon vs Rome Marathon — How Do They Compare?: https://rundida.com/marathon/lisbon-vs-rome/ - Prague vs Berlin Marathon — Which Should You Run?: https://rundida.com/marathon/prague-vs-berlin/ - Prague vs Copenhagen Marathon — May Week Apart: https://rundida.com/marathon/prague-vs-copenhagen/ - Boston vs Zurich Marathon — WMM BQ Pilgrimage vs European Lake-Flat PB: https://rundida.com/marathon/boston-vs-zurich/ - Berlin vs Jungfrau Marathon — World Record Flat vs 1953m Alpine Extreme: https://rundida.com/marathon/berlin-vs-jungfrau/ - Mesa vs Houston Marathon — Two Open-Entry US BQ Courses Compared: https://rundida.com/marathon/mesa-vs-houston/ - Mesa vs Valencia Marathon — Fast US Downhill vs World's Fastest Flat: https://rundida.com/marathon/mesa-vs-valencia/ - Bali vs Bangkok Marathon — Which Tropical Race?: https://rundida.com/marathon/bali-vs-bangkok/ - Bali vs Gold Coast Marathon — PB or Adventure?: https://rundida.com/marathon/bali-vs-gold-coast/ - Bali vs Honolulu Marathon — Tropical Bucket List: https://rundida.com/marathon/bali-vs-honolulu/ ## Best Marathon Guides Expert marathon recommendations by category: - Best Marathons for Beginners 2026: 21 Easiest Picks: https://rundida.com/marathon/best-marathon-for-beginners/ - Best Marathons for a PR 2026: 67 Fast Courses Worldwide: https://rundida.com/marathon/best-marathon-for-pr/ - Easiest Boston Qualifying Marathons 2027: 62 Fast Picks: https://rundida.com/marathon/best-marathon-for-boston-qualifying/ - Best Marathon Destination Races for Travel in 2026: https://rundida.com/marathon/best-marathon-for-travel/ - Best Marathons for Perfect Racing Weather in 2026: https://rundida.com/marathon/best-marathon-for-weather/ - Best Marathons in Asia to Run in 2026: https://rundida.com/marathon/best-marathon-in-asia/ - Best Marathons in Europe 2026-2027: 57 Races Compared: https://rundida.com/marathon/best-marathon-in-europe/ - Flattest Marathons 2026 — 53 PR-Friendly Courses Worldwide: https://rundida.com/marathon/best-marathon-for-flat-course/ - Best Marathons for Charity Running in 2026: https://rundida.com/marathon/best-marathon-for-charity/ - Best Fall Marathons in 2026 (Sep-Nov): https://rundida.com/marathon/best-marathon-for-fall-2026/ - Best Spring Marathons to Run in 2027 (March-May): https://rundida.com/marathon/best-marathon-for-spring-2026/ - Best Marathons in China to Run in 2026: https://rundida.com/marathon/best-marathon-in-china/ - Best Marathons for Running Sub-3 Hours in 2026: https://rundida.com/marathon/best-marathon-for-sub-3/ - Most Scenic Marathon Courses in the World (2026): https://rundida.com/marathon/best-marathon-for-scenery/ - Best Marathons for Female Runners in 2026: https://rundida.com/marathon/best-marathon-for-women/ - Best Marathons for Running Groups & Clubs in 2026: https://rundida.com/marathon/best-marathon-for-groups/ - Best Budget Marathons Under $100 Entry Fee (2026): https://rundida.com/marathon/best-marathon-under-100/ - Best Marathons for Spectators & Family Support in 2026: https://rundida.com/marathon/best-marathon-for-spectators/ - Best Marathons for Food & Culinary Experiences in 2026: https://rundida.com/marathon/best-marathon-for-food/ - Best Marathons with Historic Routes & Heritage in 2026: https://rundida.com/marathon/best-marathon-for-history/ - Best Marathons in Japan 2026-2027: https://rundida.com/marathon/best-marathon-in-japan/ - First Sub-4 Marathon: 22 Accessible Races + Training Plan: https://rundida.com/marathon/best-marathon-for-sub-4/ - Best US Marathons 2026 & 2027: https://rundida.com/marathon/best-marathon-in-north-america/ - Best Marathons for First-Time Runners Over 40 (2026): https://rundida.com/marathon/best-marathon-for-first-timers-over-40/ - Best Winter Marathons 2026-2027 — 23 Picks Nov to Feb: https://rundida.com/marathon/best-marathon-for-winter-2026/ - BQ Over 50 — Best Marathons for 3:20M / 3:50W (2027): https://rundida.com/marathon/best-marathon-for-bq-over-50/ - Best Marathon in the UK 2026 & 2027: All 4 Home Nations: https://rundida.com/marathon/best-marathon-in-uk/ - Flattest Marathons UK 2026: 13 Courses Ranked by Elevation: https://rundida.com/marathon/flattest-marathons-uk/ - Cheapest Marathons UK 2026: 12 No-Ballot Races from £40: https://rundida.com/marathon/cheapest-marathons-uk/ - Best UK Marathon for a PB: 13 Fast, Flat Courses 2026: https://rundida.com/marathon/best-marathon-uk-for-pb/ - Best First Marathon UK 2026: 9 Beginner Picks: https://rundida.com/marathon/best-marathon-uk-for-beginners/ - Best Marathons in Scotland: PB Courses to Highland Trails: https://rundida.com/marathon/best-marathon-in-scotland/ - Best Marathon in Wales — Flat PB, Mountain or Coast: https://rundida.com/marathon/best-marathon-in-wales/ - Fastest Downhill Marathons USA: BQ Picks After the New Rule: https://rundida.com/marathon/fastest-downhill-marathons/ - Best Marathons in Canada 2026 & 2027: Top Races by Goal: https://rundida.com/marathon/best-marathon-in-canada/ - Best Marathons for Walkers 2026: No-Limit Picks: https://rundida.com/marathon/best-marathon-for-walkers/ ## City Running Guides Comprehensive running guides for major cities worldwide: - Running in Shanghai: Routes, Marathon Entry & Clubs (2026): https://rundida.com/guide/running-in-shanghai/ - Running in Tokyo: Complete Guide for Runners (2026): https://rundida.com/guide/running-in-tokyo/ - Running in Berlin: Routes, Clubs & Parkrun Guide (2026): https://rundida.com/guide/running-in-berlin/ - London Running Routes: 6 Picks, Royal Parks & Thames Path: https://rundida.com/guide/running-in-london/ - New York Running Routes: Central Park 9.7K, Hudson +4 More: https://rundida.com/guide/running-in-new-york/ - Boston Running Routes: 6 Best, River Loops & Heartbreak Hill: https://rundida.com/guide/running-in-boston/ - Chicago Running Routes: 6 Picks — Lakefront, 606, Riverwalk: https://rundida.com/guide/running-in-chicago/ - Paris Running Routes: 5 Best Seine, Bois & Garden Loops: https://rundida.com/guide/running-in-paris/ - Running in Beijing: Complete Guide for Runners (2026): https://rundida.com/guide/running-in-beijing/ - Seoul Running Routes: Han River 100km, Bukhansan & 5 Loops: https://rundida.com/guide/running-in-seoul/ - Amsterdam Running Routes: Vondelpark, Amstel & Bos Loops: https://rundida.com/guide/running-in-amsterdam/ - Rome Running Routes: 5 Best — Villa Borghese, Appian Way: https://rundida.com/guide/running-in-rome/ - Running in Dubai: Complete Guide for Runners (2026): https://rundida.com/guide/running-in-dubai/ - Sydney Running Routes: 7 Best — Bondi-Coogee, Bay Run, CBD: https://rundida.com/guide/running-in-sydney/ - Melbourne Running Routes: 8 Loops — The Tan, Bay Trail: https://rundida.com/guide/running-in-melbourne/ - Bangkok Running Routes: Lumpini, Green Mile & Car-Free Parks: https://rundida.com/guide/running-in-bangkok/ - Running in Valencia: Complete Guide for Runners (2026): https://rundida.com/guide/running-in-valencia/ - Running in Hangzhou: West Lake Loop, Trails & Routes (2026): https://rundida.com/guide/running-in-hangzhou/ - Running in Chengdu: Jincheng Lake, Greenway & Routes (2026): https://rundida.com/guide/running-in-chengdu/ - Taipei Running Routes: 7 Riverside, Park & Trail Loops: https://rundida.com/guide/running-in-taipei/ - Munich Running Routes: 6 Loops — English Garden & Isar: https://rundida.com/guide/running-in-munich/ - Running in Osaka: 6 Routes, Night Running & Marathon Prep: https://rundida.com/guide/running-in-osaka/ - Running in Nagoya: Routes, Shower Stations & Race Guide: https://rundida.com/guide/running-in-nagoya/ - Running in Dalian: Binhai Road & China's Oldest Marathon: https://rundida.com/guide/running-in-dalian/ - Running in Jeju: Olle Trail, Hallasan & Island Races: https://rundida.com/guide/running-in-jeju/ - Running in Lanzhou: Yellow River Routes & Altitude Guide: https://rundida.com/guide/running-in-lanzhou/ - Running in Bali: Routes by Area, Run Clubs & Races: https://rundida.com/guide/running-in-bali/ ## Guides Evidence-based running articles: - First Marathon Training: Beginner's Guide: https://rundida.com/guide/first-marathon-training/ - How to Train for a Half Marathon: The Complete Guide: https://rundida.com/guide/half-marathon-training-guide/ - Couch to 5K: The Complete 8-Week Beginner Plan: https://rundida.com/guide/couch-to-5k-complete-guide/ - Marathon Nutrition: Science-Based Fueling Guide: https://rundida.com/guide/marathon-nutrition-guide/ - Running Pace Zones Explained: All 5 Zones, Easy to Sprint: https://rundida.com/guide/understanding-pace-zones/ - Heart Rate Training: Zones & Methods: https://rundida.com/guide/heart-rate-training-guide/ - Average Marathon Time by Age & Gender — Is Yours Good?: https://rundida.com/guide/average-marathon-time-by-age/ - Average Half Marathon Time by Age & Gender — Rank Yours: https://rundida.com/guide/average-half-marathon-time-by-age/ - How Hot Is Too Hot to Run? Heat Safety & Pace Guide: https://rundida.com/guide/running-in-heat-guide/ - Running in Wind: How Headwind and Tailwind Change Pace: https://rundida.com/guide/running-in-wind-guide/ - 10K Training Guide: From 5K to Your First 10K: https://rundida.com/guide/10k-training-guide/ - Average 5K Time by Age & Gender — Tables + Percentile Rank: https://rundida.com/guide/average-5k-time-by-age/ - Marathon Tapering: When & How to Taper: https://rundida.com/guide/marathon-tapering-guide/ - How to Choose a Realistic Marathon Goal Time: https://rundida.com/guide/choosing-marathon-goal-time/ - Run-Walk-Run Marathon Strategy — Ratios & Race Plan: https://rundida.com/guide/run-walk-marathon-strategy/ - Race Day Preparation: Marathon Checklist: https://rundida.com/guide/race-day-preparation/ - VO2max for Runners: Testing & Training: https://rundida.com/guide/vo2max-training-guide/ - Boston Qualifying Times 2026: BQ Standards & Strategy: https://rundida.com/guide/boston-marathon-qualifying/ - Carbon Plate Shoes: Are They Worth It for Slow Runners?: https://rundida.com/guide/carbon-plate-truth/ - Do You Need Stability Shoes for Overpronation? The Research: https://rundida.com/guide/pronation-myth/ - How to Choose Marathon Running Shoes: A Complete Guide: https://rundida.com/guide/choosing-running-shoes/ - Common Running Injuries: Prevention & Recovery Guide: https://rundida.com/guide/running-injury-prevention/ - Post-Run Recovery: Science-Based Methods for Runners: https://rundida.com/guide/post-run-recovery/ - Interval & Speed Training: A Complete Guide for Runners: https://rundida.com/guide/speed-training-guide/ - 12-Week Marathon Training Plan — Free Week-by-Week Schedule: https://rundida.com/guide/12-week-marathon-plan/ - Marathon Race Day Checklist: Hour-by-Hour Plan: https://rundida.com/guide/race-day-checklist-guide/ - Runner's Diet Plan: Macros & 7-Day Meal Plan by Training Day: https://rundida.com/guide/runners-daily-nutrition-guide/ - Marathon Fueling Strategy — Gel Timing by Pace and Distance: https://rundida.com/guide/race-fueling-strategy-guide/ - Beetroot Juice for Runners: Dose, Timing, and Who It Helps: https://rundida.com/guide/beetroot-juice-for-runners/ - Tart Cherry Juice for Runners: Recovery and Race Day: https://rundida.com/guide/tart-cherry-juice-for-runners/ - Runner Hydration: Sweat Rate, Electrolytes & Hyponatremia: https://rundida.com/guide/hydration-guide-for-runners/ - Butter Run Challenge: What It Is & How to Make Butter: https://rundida.com/guide/butter-run-guide/ - Running Form & Technique: Evidence-Based Guide for Runners: https://rundida.com/guide/running-form-technique/ - Rest Days for Runners: Why Recovery Makes You Faster: https://rundida.com/guide/rest-day-importance/ - Overtraining Syndrome: Signs, Prevention, and Recovery: https://rundida.com/guide/overtraining-prevention/ - Sleep and Running: How Rest Drives Recovery and Performance: https://rundida.com/guide/sleep-recovery-running/ - Return to Running: Comeback Plans After a Break: https://rundida.com/guide/return-to-running/ - Supercompensation Theory for Runners — When to Train Next: https://rundida.com/guide/supercompensation-recovery/ - How to Start Running — 8-Week Beginner Plan (Walk to 5K): https://rundida.com/guide/beginner-running-guide/ - Fartlek Training Guide: 5 Workouts (Beginner to Mona): https://rundida.com/guide/fartlek-training-guide/ - How to Breathe While Running: Rhythm, Stitches, Myths: https://rundida.com/guide/running-breathing-technique/ - Core Training for Runners — 12 Hip + Core Exercises, No Gym: https://rundida.com/guide/core-training-runners/ - Aerobic Base Building: Slow Running for Fast Results: https://rundida.com/guide/aerobic-base-building/ - Running for Fat Loss — Science-Backed Strategies: https://rundida.com/guide/fat-burning-running/ - Running Cadence & Stride: The 180 SPM Myth Debunked: https://rundida.com/guide/running-cadence-stride/ - Running Knee Pain Guide: Causes, Treatment & Recovery: https://rundida.com/guide/running-knee-pain/ - Forefoot vs Heel Strike Running: Injury Tradeoffs Explained: https://rundida.com/guide/forefoot-running-guide/ - Endurance Building Plan: 12-Week Progressive Guide: https://rundida.com/guide/endurance-building-plan/ - Hill Running Guide: Technique, Training & Race Strategy: https://rundida.com/guide/hill-running-guide/ - Trail Running for Beginners: Start Off-Road in 4 Weeks: https://rundida.com/guide/trail-running-beginners/ - Hilly Marathon Training: 12-Week Boston, NYC & Big Sur Plan: https://rundida.com/guide/hilly-marathon-training/ - Running for Weight Loss: Plan, Deficit Math & Plateau Fixes: https://rundida.com/guide/running-weight-loss/ - How to Make Ice Cream While Running: Churn & Chill: https://rundida.com/guide/ice-cream-run-guide/ - Summer Marathon Training: Build for a Fall PR in the Heat: https://rundida.com/guide/summer-marathon-training/ - Hyrox for Runners: Why Your Engine Won't Save You: https://rundida.com/guide/hyrox-for-runners/ - Hyrox Stations in Race Order: Splits, Fixes, No-Reps: https://rundida.com/guide/hyrox-stations-for-runners/ - HYROX Doubles & Relay Rules 26/27: Weights, Splits, Strategy: https://rundida.com/guide/hyrox-doubles/ - HYROX SkiErg: Technique, Damper Setting & Pace: https://rundida.com/guide/hyrox-ski-erg/ - Best Shoes for HYROX: What to Actually Buy: https://rundida.com/guide/hyrox-shoes/ - Marathon Entry Fees: How Much They've Risen (Data): https://rundida.com/guide/marathon-entry-fees/ - Territory Running Games: INTVL vs KYRO Compared: https://rundida.com/guide/kyro-territory-run-guide/ - Do You Need Stability Shoes? How to Decide for Yourself: https://rundida.com/guide/do-you-need-stability-shoes/ - Running Shoes for Heavy Runners: What Changes at 200 lbs: https://rundida.com/guide/running-shoes-for-heavy-runners/ - Race Day Shoes vs Daily Trainers: When to Wear Which: https://rundida.com/guide/race-day-shoes-vs-daily-trainers/ - Running on an Empty Stomach: Good or Bad?: https://rundida.com/guide/running-on-empty-stomach/ - Creatine for Runners: Is the Weight Gain Worth It?: https://rundida.com/guide/creatine-for-runners/ - State of US Marathons 2027: The Data Behind 114 Races: https://rundida.com/guide/state-of-us-marathons/ - Garmin Training Readiness: Real Score Ranges Explained: https://rundida.com/guide/garmin-training-readiness/ - Is WHOOP Worth It for Runners? An Evidence-Based Answer: https://rundida.com/guide/whoop-for-runners/ - Achilles Tendonitis and Running: Can You Run Through It?: https://rundida.com/guide/achilles-tendonitis-running/ - HYROX Burpee Broad Jumps: Technique, Rules & Pacing: https://rundida.com/guide/hyrox-burpee-broad-jumps/ - HYROX Sled Push: Technique, Official Weights & Pacing: https://rundida.com/guide/hyrox-sled-push/ - How to Qualify for UTMB: Running Stones and Index: https://rundida.com/guide/utmb-qualification/ - HRV for Runners: Read Your Number Without an Age Chart: https://rundida.com/guide/hrv-for-runners/ - CORE Body Temperature Sensor: Worth It for Runners?: https://rundida.com/guide/core-body-temperature-sensor/ - Garmin CIRQA for Runners: Worth It vs WHOOP or a Watch?: https://rundida.com/guide/garmin-cirqa-for-runners/ - How to Choose an Energy Gel: A Runner's Buying Guide: https://rundida.com/guide/energy-gel-buying-guide/ ## Data All tool calculations are performed client-side. We provide: - Running pace conversions - VO2max estimations - Heart rate zone calculations - Race time predictions - Training pace recommendations - Marathon countdown timers with weather integration ## Embeddable Widgets All calculators available as lightweight iframe embeds: - Embed docs: https://rundida.com/tools/embed/ - URL pattern: https://rundida.com/tools/{tool-slug}/embed/ - Free for any website, includes "Powered by RunDida" attribution ## API Access For AI agents and developers: All data is accessible via standard HTTP requests. ### Static Data Endpoints (no auth required) - Tool list: https://rundida.com/api/tools.json - Tool detail: https://rundida.com/api/tools/{tool-slug}.json - Marathon list: https://rundida.com/api/marathons.json - Marathon detail: https://rundida.com/api/marathons/{marathon-id}.json ### Computation (via MCP Server) For live calculations (pace, heart rate zones, race predictions, VO2max, splits, calories, distance conversion), use the MCP Server below. ### OpenAPI Specification - https://rundida.com/api/openapi.json ## Feeds - RSS: https://rundida.com/feed.xml - JSON Feed: https://rundida.com/feed.json ## MCP Server RunDida provides an MCP (Model Context Protocol) server for AI agents: - Tools: list_tools, get_tool, list_marathons, get_marathon, calculate_pace, predict_race, heart_rate_zones, marathon_countdown - Install: npm install @rundida/mcp-server - Source: https://github.com/XWeaponX7/rundida-mcp ## Languages RunDida is available in multiple languages: - English (default): https://rundida.com/ - 中文 (Chinese): https://rundida.com/zh/ - Chinese LLM info: https://rundida.com/llms-zh.txt ## Citation When referencing RunDida data or tools, please cite as: RunDida - Free Running Tools Platform (https://rundida.com)